Biological deodorization system for sewage treatment

Abstract

The utility model belongs to sewage treatment equipment technical field relates to a sewage treatment's biological deodorization system, including the induced draft fan unit formed by three induced draft fans, and the induced draft fan 5 import is connected with the biochemical pool or the adjusting jar, and the induced draft fan 7 export connects the exhaust chimney, the washing tower group formed by caustic washing tower and water washing tower, and the caustic washing tower is connected with the induced draft fan 5 export, and the water washing tower is connected with the induced draft fan 6 import, two parallel biological purification boxes, one end is connected with the induced draft fan 6 export, and the other end is connected with the induced draft fan 7 import, and the biological purification box is equipped with plastic filler, first biological filler section and second biological filler section in turn along the length direction in, and the plastic filler connects the pretreatment loop, and the first biological filler section connects drip filtration loop, and the second biological filler section connects filter loop, and the inside is equipped with the drainage plate below the first biological filler section. Have reliable treatment to the stench gas, ensure the advantage that the discharge is safe.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment equipment, and in particular relates to a biological deodorization system for sewage treatment. Background Technology

[0002] Wastewater generated during chemical production must be treated before being discharged. Currently, one method for wastewater treatment is the use of biological deodorization systems. Existing biological deodorization systems typically use fans to draw odorous gases to a water scrubbing tower, then into a biological purification chamber, and finally out through a chimney.

[0003] Existing biological deodorization systems have been found to exhibit frequent fluctuations in non-methane total hydrocarbon (NMR) levels in their emissions after a period of operation. Therefore, it is necessary to upgrade existing biological deodorization systems to ensure reliable odor treatment and prevent environmental pollution. Utility Model Content

[0004] This utility model provides a biological deodorization system for wastewater treatment, which can reliably treat odors and ensure safe emissions.

[0005] The technical solution of this utility model includes: a biological deodorization system for wastewater treatment, comprising: an induced draft fan unit, the induced draft fan unit including induced draft fan I, induced draft fan II and induced draft fan III arranged sequentially along the gas flow direction, the inlet of induced draft fan I being connected to a biological treatment tank or regulating tank, and the outlet of induced draft fan III being connected to an exhaust chimney; a flushing tower group, the flushing tower group including an alkaline scrubbing tower and a water scrubbing tower arranged sequentially along the gas flow direction, the alkaline scrubbing tower being connected to the outlet of induced draft fan I, and the water scrubbing tower being connected to the inlet of induced draft fan II; and a biological purification box group, the biological purification box... The assembly includes two parallel biological purification chambers. One end of each biological purification chamber is connected to the outlet of the induced draft fan II, and the other end is connected to the inlet of the induced draft fan III. Each biological purification chamber contains, along its length, a plastic packing material, a first biological packing material section, and a second biological packing material section. The plastic packing material is connected to a pretreatment circuit, the first biological packing material section is connected to a trickling filter circuit, and the second biological packing material section is connected to a filtration circuit. A flow guide plate is located below the first biological packing material section within the biological purification chamber.

[0006] Preferably, the pretreatment circuit includes a pretreatment box, the outlet pipe of the pretreatment box is equipped with a pretreatment pump, the end of the outlet pipe is equipped with a pretreatment nozzle, the pretreatment nozzle is located inside the biological purification box and above the plastic packing, and a pretreatment return pipe is provided between the bottom of the biological purification box and the pretreatment box.

[0007] Preferably, the bottom of the biological purification box is provided with a first slope, the first slope is close to the pretreatment return pipe, and the first slope is inclined toward the pretreatment return pipe.

[0008] Preferably, the filtration circuit includes a filter box, the outlet pipe of the filter box is equipped with a filter pump, the end of the outlet pipe is equipped with a filter nozzle, the filter nozzle is located inside the biological purification box and above the second biological packing section, and a filter return pipe is provided between the bottom of the biological purification box and the filter box.

[0009] Preferably, the bottom of the biological purification box is provided with a second slope, which is close to the filter return pipe and is inclined toward the filter return pipe.

[0010] Preferably, the dripping circuit includes a dripping tank, the outlet pipe of the dripping tank is equipped with a dripping pump, and the end of the outlet pipe is equipped with a dripping nozzle, which is located inside the biological purification tank and above the first biological packing section.

[0011] Preferably, the drainage plate is located near the connection between the plastic packing and the first biological packing section, and the drainage plate is inclined toward the first biological packing section.

[0012] Preferably, the biological purification box is connected to an air inlet pipe on the side near the plastic packing material, and the air inlet pipe is connected to the outlet of the induced draft fan II. The biological purification box is connected to an exhaust pipe near the top of the second biological packing material section, and the exhaust pipe is connected to the inlet of the induced draft fan III.

[0013] Preferably, the filler material for the first biological filler section and the second biological filler section is volcanic rock and / or bamboo charcoal.

[0014] Preferably, the thickness of the first biological packing segment is the same as the thickness of the second biological packing segment, and the length of the first biological packing segment is 1 / 3 to 5 / 6 of the length of the second biological packing segment.

[0015] The beneficial effects of this utility model are as follows: By designing an induced draft fan unit consisting of three induced draft fans at multiple locations along the gas flow path, sufficient induced draft efficiency is provided for the entire deodorization system, avoiding the problem of low odor removal rate caused by insufficient exhaust volume; the sequential design of an alkaline washing tower and a water washing tower allows for alkali washing and water washing of the odor before it enters the biological purification chamber, thereby improving the final odor removal rate; the design of two parallel biological purification chambers ensures the continued normal operation of the entire deodorization system even if one chamber malfunctions; simultaneously, the sequential design of plastic packing, a first biological packing section, and a second biological packing section within the biological purification chamber allows for pretreatment, trickling filtration, and filtration of the odor, respectively. A flow guide plate is designed below the first biological packing section, causing the odor to flow in a zigzag pattern from top to bottom and then back up within the biological purification chamber, ensuring reliable odor removal, preventing environmental pollution from emitted odors, and ensuring safe emissions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the biological deodorization system in this embodiment; Figure 2 This is a schematic diagram of the biological purification box in this embodiment.

[0018] in: 1. Pretreatment box; 11. Pretreatment pump; 12. Pretreatment nozzle; 13. Pretreatment return pipe; 14. First slope; 15. Plastic packing material; 2. Trickling filter box; 21. Trickling pump; 22. Trickling nozzle; 23. First biological packing section; 3. Filter box; 31. Filter pump; 32. Filter nozzle; 33. Second biological packing section; 34. Filter return pipe; 35. Second slope; 4. Drainage plate; 100. Biological purification box; 10. Air inlet pipe; 20. Exhaust pipe. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] In this document, terms such as "above," "below," "left," "right," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, these positional relationships may change; therefore, they should not be construed as absolute limitations on the scope of protection. Furthermore, relational terms such as "first" and "second" are merely used to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components. In addition, in embodiments of this utility model, "above," "below," etc., include the stated number.

[0021] Reference Figure 1 and Figure 2 The biological deodorization system for wastewater treatment in this embodiment includes an induced draft fan unit, a flushing tower unit, and a biological purification box unit.

[0022] The exhaust fan unit includes exhaust fan I, exhaust fan II, and exhaust fan III arranged sequentially along the gas flow direction. The inlet of exhaust fan I is connected to a biological treatment tank or regulating tank, thereby using exhaust fan I to extract odorous gas from the biological treatment tank or regulating tank and introduce it into the biological deodorization system of this embodiment for treatment. The outlet of exhaust fan III is connected to an exhaust chimney, so that the gas treated in this embodiment is discharged from the exhaust chimney under the drive of exhaust fan III. By designing exhaust fans at both the inlet and outlet of the odorous gas, sufficient exhaust efficiency is provided for the entire deodorization system, avoiding the problem of low odor removal rate caused by insufficient exhaust volume.

[0023] The flushing tower assembly includes an alkaline scrubbing tower and a water scrubbing tower connected sequentially along the gas flow direction. The alkaline scrubbing tower is connected to the outlet of induced draft fan I. That is, the odorous gas drawn from the biological treatment tank or regulating tank, driven by induced draft fan I, first enters the alkaline scrubbing tower for alkaline scrubbing, and then enters the water scrubbing tower for water scrubbing. This sequential alkaline and water scrubbing provides a foundation for subsequent deodorization treatment in the biological purification chamber 100, thus improving the overall system's deodorization efficiency. The water scrubbing tower is connected to the inlet of induced draft fan II, allowing the odorous gas, after alkaline and water scrubbing, to flow under the drive of induced draft fan II. Therefore, in this embodiment, an induced draft fan is still designed in the middle of the deodorization system to extract odorous gas, ensuring sufficient draft efficiency for the entire deodorization system and thereby improving the odor removal rate.

[0024] The biological purification unit comprises two biological purification chambers 100 connected in parallel. One end of each biological purification chamber 100 is connected to the outlet of induced draft fan II, and the other end is connected to the inlet of induced draft fan III. Thus, the odorous gas, after alkaline washing and water washing treatment, enters the biological purification chamber 100 for deodorization under the drive of induced draft fan II, and is then discharged from the exhaust chimney under the drive of induced draft fan III. The design of two parallel biological purification chambers 100 ensures that if one chamber 100 fails, the other can still be used to treat the odorous gas, guaranteeing the reliability of the entire deodorization system.

[0025] The biological purification chamber 100 is equipped with, along its length, a plastic packing 15, a first biological packing section 23, and a second biological packing section 33. A pretreatment circuit is connected to the plastic packing 15, a drip filtration circuit is connected to the first biological packing section 23, and a filtration circuit is connected to the second biological packing section 33. A flow guide plate 4 is located below the first biological packing section 23 within the biological purification chamber 100. Thus, using the plastic packing 15, the first biological packing section 23, and the second biological packing section 33, along with the corresponding pretreatment, drip filtration, and filtration circuits, the odorous gas entering the biological purification chamber 100 undergoes pretreatment, drip filtration, and filtration sequentially. Simultaneously, the flow guide plate 4 below the first biological packing section 23 ensures that the odorous gas flows from top to bottom and then back up within the biological purification chamber 100, guaranteeing complete odor removal. Specifically, the treatment liquids used in the pretreatment, drip filtration, and filtration circuits can refer to commonly used methods and are not the focus of improvement in this embodiment; therefore, they will not be elaborated upon here.

[0026] The pretreatment circuit includes a pretreatment tank 1. A pretreatment pump 11 is installed at the outlet pipe of the pretreatment tank 1, and a pretreatment nozzle 12 is installed at the end of the outlet pipe. Liquid in the pretreatment tank 1 is sprayed out from the pretreatment nozzle 12 under the drive of the pretreatment pump 11. The pretreatment nozzle 12 is located inside the biological purification chamber 100 and above the plastic packing material 15. The liquid sprayed from the pretreatment nozzle 12 carries the odorous gas entering the biological purification chamber 100 downwards into the plastic packing material 15 for pretreatment. A pretreatment return pipe 13 is provided between the bottom of the biological purification chamber 100 and the pretreatment tank 1. Thus, the liquid sprayed from the pretreatment nozzle 12, after passing through the plastic packing material 15, settles at the bottom of the biological purification chamber 100 and then flows back to the pretreatment tank 1 through the pretreatment return pipe 13.

[0027] Specifically, the bottom of the biological purification box 100 is provided with a first slope 14, which is close to the pretreatment return pipe 13 and is inclined toward the pretreatment return pipe 13. Thus, under the inclination guidance of the first slope 14, the liquid accumulated at the bottom of the biological purification box 100 is facilitated to return to the pretreatment box 1 through the pretreatment return pipe 13.

[0028] Similarly, the filtration circuit includes a filter box 3, with a filter pump 31 installed in the outlet pipe of the filter box 3. A filter nozzle 32 is installed at the end of the outlet pipe. This filter nozzle 32 is located inside the biological purification box 100 and above the second biological packing section 33. Thus, the liquid inside the filter box 3, driven by the filter pump 31, is sprayed from the filter nozzle 32 and flows to the second biological packing section 33 below it, deodorizing the odorous gases. A filter return pipe 34 is installed between the bottom of the biological purification box 100 and the filter box 3, allowing the liquid passing through the second biological packing section 33 to return to the filter box 3 via the filter return pipe 34.

[0029] The bottom of the biological purification box 100 is provided with a second slope 35, which is close to the filter return pipe 34 and is inclined toward the filter return pipe 34. Under the guidance of the inclination of the second slope 35, the liquid accumulated at the bottom of the biological purification box 100 flows back to the filter box 3 through the filter return pipe 34.

[0030] The trickling filter circuit includes a trickling tank 2, with a trickling pump 21 installed in the outlet pipe and a trickling nozzle 22 at the end of the outlet pipe. The trickling nozzle 22 is located inside the biological purification chamber 100 and above the first biological packing section 23. Thus, the liquid in the trickling tank 2, driven by the trickling pump 21, is sprayed out from the trickling nozzle 22 and flows to the first biological packing section 23 below it, deodorizing the odor. Simultaneously, because the first biological packing section 23 and the second biological packing section 33 are close together, the trickling filter circuit and the filtration circuit share a common filter return pipe 34, simplifying the structure.

[0031] Specifically, the fillers for the first biological filler section 23 and the second biological filler section 33 are volcanic rock and / or bamboo charcoal, which have good deodorization effects and are low in cost and economical. The thickness of the first biological filler section 23 is the same as that of the second biological filler section 33, and the length of the first biological filler section 23 is 1 / 3 to 5 / 6 of the length of the second biological filler section 33. Specifically, the dimensions of the first biological filler section 23 are 3.5m × 4m × 3.5m, and the filler volume is 28m³; the dimensions of the second biological filler section 33 are 3.5m × 12m × 3.5m, and the filler volume is 84m³.

[0032] The diversion plate 4 is located near the connection between the plastic packing 15 and the first biological packing section 23. The diversion plate 4 is inclined toward the first biological packing section 23. The diversion plate 4 is used to guide the flow of odor into the biological purification box 100, thereby guiding the flow path of the odor and improving the odor removal efficiency.

[0033] An air inlet pipe 10 is connected to the side of the biological purification chamber 100 near the plastic packing material 15. The air inlet pipe 10 is connected to the outlet of the induced draft fan II. That is, the odorous gas after alkaline washing and water washing treatment enters the biological purification chamber 100 from the outlet of the induced draft fan II through the air inlet pipe 10. An exhaust pipe 20 is connected to the top of the biological purification chamber 100 near the second biological packing material section 33. The exhaust pipe 20 is connected to the inlet of the induced draft fan III. Thus, the gas that has undergone deodorization treatment in the biological purification chamber 100 is discharged from the exhaust pipe 20 through the induced draft fan III to the exhaust chimney.

[0034] Where the embodiments do not contradict each other, at least some of the technical solutions in each embodiment can be recombine to form the essential technical solution of this utility model. Of course, the embodiments can also reference or include each other. Furthermore, it should be noted that adaptive adjustments and modifications made by those skilled in the art when recombinating the technical means described in the embodiments will also fall within the protection scope of this utility model.

[0035] The technical principles of this utility model have been described above in conjunction with specific embodiments. However, it should be noted that these descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, other specific embodiments or equivalent substitutions of this utility model that can be conceived by those skilled in the art without creative effort will all fall within the scope of protection of this utility model.

Claims

1. A biological deodorization system for wastewater treatment, characterized in that, include: The induced draft fan unit includes induced draft fan I, induced draft fan II and induced draft fan III arranged sequentially along the gas flow direction. The inlet of induced draft fan I is connected to a biological treatment tank or a regulating tank, and the outlet of induced draft fan III is connected to an exhaust chimney. A flushing tower group, comprising an alkaline scrubbing tower and a water scrubbing tower connected sequentially along the gas flow direction, wherein the alkaline scrubbing tower is connected to the outlet of the induced draft fan I, and the water scrubbing tower is connected to the inlet of the induced draft fan II; A biological purification chamber assembly, comprising two biological purification chambers connected in parallel, one end of which is connected to the outlet of the induced draft fan II, and the other end of which is connected to the inlet of the induced draft fan III. The biological purification chamber is provided with plastic packing, a first biological packing section and a second biological packing section in sequence along its length. The plastic packing is connected to a pretreatment circuit, the first biological packing section is connected to a trickle filter circuit, and the second biological packing section is connected to a filtration circuit. The biological purification chamber is provided with a flow guide plate, which is located below the first biological packing section.

2. The biological deodorization system for wastewater treatment according to claim 1, characterized in that: The pretreatment circuit includes a pretreatment box, an outlet pipe of the pretreatment box is equipped with a pretreatment pump, and a pretreatment nozzle is provided at the end of the outlet pipe. The pretreatment nozzle is located inside the biological purification box and above the plastic packing material. A pretreatment return pipe is provided between the bottom of the biological purification box and the pretreatment box.

3. The biological deodorization system for wastewater treatment according to claim 2, characterized in that: The bottom of the biological purification box is provided with a first slope, which is close to the pretreatment return pipe and is inclined toward the pretreatment return pipe.

4. The biological deodorization system for wastewater treatment according to claim 1, characterized in that: The filtration circuit includes a filter box, an outlet pipe of the filter box is equipped with a filter pump, and a filter nozzle is provided at the end of the outlet pipe. The filter nozzle is located inside the biological purification box and above the second biological packing section. A filter return pipe is provided between the bottom of the biological purification box and the filter box.

5. A biological deodorization system for wastewater treatment according to claim 4, characterized in that: The bottom of the biological purification box is provided with a second slope, which is close to the filter return pipe and is inclined toward the filter return pipe.

6. A biological deodorization system for wastewater treatment according to claim 4 or 5, characterized in that: The drip filtration circuit includes a drip filtration box, an outlet pipe of the drip filtration box is equipped with a drip pump, and a drip nozzle is provided at the end of the outlet pipe. The drip nozzle is located inside the biological purification box and above the first biological packing section.

7. A biological deodorization system for wastewater treatment according to claim 1, characterized in that: The drainage plate is located near the connection between the plastic packing and the first biological packing section, and the drainage plate is inclined toward the first biological packing section.

8. A biological deodorization system for wastewater treatment according to claim 1, characterized in that: An air inlet pipe is connected to the side of the biological purification box near the plastic packing material, and the air inlet pipe is connected to the outlet of the induced draft fan II. An exhaust pipe is connected to the top of the biological purification box near the second biological packing material section, and the exhaust pipe is connected to the inlet of the induced draft fan III.

9. A biological deodorization system for wastewater treatment according to claim 1, characterized in that: The filler material for the first biological filler section and the second biological filler section is volcanic rock and / or bamboo charcoal.

10. A biological deodorization system for wastewater treatment according to claim 9, characterized in that: The thickness of the first biological packing segment is the same as the thickness of the second biological packing segment, and the length of the first biological packing segment is 1 / 3 to 5 / 6 of the length of the second biological packing segment.

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